MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Design Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What happens in the repulsion motor starting method? |
| A. | the cage windings is dominant |
| B. | the commutator windings are dominant |
| C. | the rotor windings are dominant |
| D. | the stator windings are dominant |
| Answer» C. the rotor windings are dominant | |
| 2. |
What is the specialty in the repulsion motor starting method? |
| A. | cage winding is replaced by armature windings |
| B. | cage winding is replaced by field windings |
| C. | cage winding is replaced by commutator windings |
| D. | cage winding is replaced by bearings |
| Answer» D. cage winding is replaced by bearings | |
| 3. |
When is the repulsion motor starting method used? |
| A. | when low starting torque is required |
| B. | when high starting torque is required |
| C. | when high running torque is required |
| D. | when low running torque is required |
| Answer» C. when high running torque is required | |
| 4. |
For what type of machines is the shaded pole starting method suitable? |
| A. | for outputs below 60 watt |
| B. | for output below 50 watt |
| C. | for output below 40 watt |
| D. | for output above 50 watt |
| Answer» B. for output below 50 watt | |
| 5. |
FOR_WHAT_TYPE_OF_MACHINES_IS_THE_SHADED_POLE_STARTING_METHOD_SUITABLE??$ |
| A. | for outputs below 60 watt |
| B. | for output below 50 watt |
| C. | for output below 40 watt |
| D. | for output above 50 watt |
| Answer» B. for output below 50 watt | |
| 6. |
What is the speciality in the repulsion motor starting method?$ |
| A. | cage winding is replaced by armature windings |
| B. | cage winding is replaced by field windings |
| C. | cage winding is replaced by commutator windings |
| D. | cage winding is replaced by bearings |
| Answer» D. cage winding is replaced by bearings | |
| 7. |
When_is_the_repulsion_motor_starting_method_used?$ |
| A. | when low starting torque is required |
| B. | when high starting torque is required |
| C. | when high running torque is required |
| D. | when low running torque is required |
| Answer» C. when high running torque is required | |
| 8. |
What is the range of the starting torque of shaded pole induction motor? |
| A. | 2-4 |
| B. | 2-3.5 |
| C. | 0.2-0.3 |
| D. | 0.25-0.5 |
| Answer» D. 0.25-0.5 | |
| 9. |
What is the range of the starting current of capacitor type induction motor? |
| A. | 5-7 |
| B. | 4–6 |
| C. | 2-6 |
| D. | 2-3 |
| Answer» C. 2-6 | |
| 10. |
What is the range of output watt for the shaded pole induction machine? |
| A. | 0.37-50 |
| B. | 90-750 |
| C. | 90-3700 |
| D. | 7.5-370 |
| Answer» B. 90-750 | |
| 11. |
What_happens_in_the_repulsion_motor_starting_method? |
| A. | the cage windings is dominant |
| B. | the commutator windings are dominant |
| C. | the rotor windings are dominant |
| D. | the stator windings are dominant |
| Answer» C. the rotor windings are dominant | |
| 12. |
What happens in the shaded pole starting method according to the displacement? |
| A. | displacement between shaded and unshaded portion varies between 200-250 |
| B. | displacement between shaded and unshaded portion varies between 200-350 |
| C. | displacement between shaded and unshaded portion varies between 200-300 |
| D. | displacement between shaded and unshaded portion varies between 300-450 |
| Answer» D. displacement between shaded and unshaded portion varies between 300-450 | |
| 13. |
What is the shaded pole starting method? |
| A. | part of the pole is shaded by open circuited copper ring |
| B. | part of the pole is shaded by short circuited copper ring |
| C. | the pole is shaded by open circuited copper ring |
| D. | the pole is shaded by short circuited copper ring |
| Answer» C. the pole is shaded by open circuited copper ring | |
| 14. |
When is the starting winding cut out of the circuit in the split phase motor? |
| A. | when the motor speed reaches 65 % of the full load speed |
| B. | when the motor speed reaches 75 % of the full load speed |
| C. | when the motor speed reaches 50 % of the full load speed |
| D. | when the motor speed reaches 85 % of the full load speed |
| Answer» C. when the motor speed reaches 50 % of the full load speed | |
| 15. |
How is the required phase displacement between the current in the running and starting windings obtained? |
| A. | by connecting a suitable resistor |
| B. | by connecting a suitable capacitor |
| C. | by connecting a suitable inductor |
| D. | by connecting a suitable impedance |
| Answer» E. | |
| 16. |
What is the displacement of the running and the starting windings used? |
| A. | running winding displaces the starting winding by 1800 |
| B. | running winding displaces the starting winding by 900 |
| C. | starting winding displaces the running winding by 900 |
| D. | starting winding displaces the running winding by 1800 |
| Answer» C. starting winding displaces the running winding by 900 | |
| 17. |
What are the names of the windings used in the split phase starting? |
| A. | starting windings |
| B. | auxiliary windings |
| C. | starting or auxiliary windings |
| D. | starting and auxiliary windings |
| Answer» D. starting and auxiliary windings | |
| 18. |
How many methods are present in the self starting of the single phase induction motor? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 19. |
What is the special feature of single phase induction motor? |
| A. | high starting torque |
| B. | low starting torque |
| C. | average starting torque |
| D. | zero starting torque |
| Answer» E. | |